netbsd-elf.h

gcc3.2.1源代码

/* Definitions of target machine for GNU compiler,
   for i386/ELF NetBSD systems.
   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   Contributed by matthew green <[e-mail]>

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Provide a LINK_SPEC appropriate for a NetBSD/i386 ELF target.
   This is a copy of LINK_SPEC from <netbsd-elf.h> tweaked for
   the i386 target.  */

#undef LINK_SPEC
#define LINK_SPEC							\
 "%{assert*} %{R*}							\
  %{shared:-shared}							\
  %{!shared:								\
    -dc -dp								\
    %{!nostdlib:							\
      %{!r*:								\
	%{!e*:-e __start}}}						\
    %{!static:								\
      %{rdynamic:-export-dynamic}					\
      %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}}	\
    %{static:-static}}"

/* Names to predefine in the preprocessor for this target machine.  */

#define CPP_PREDEFINES							\
  "-D__NetBSD__ -D__ELF__ -Asystem=unix -Asystem=NetBSD"

/* Make gcc agree with <machine/ansi.h> */

#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"

#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"

#undef ASM_APP_ON
#define ASM_APP_ON "#APP\n"

#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"

#undef ASM_FINAL_SPEC

#undef ASM_COMMENT_START
#define ASM_COMMENT_START "#"

#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(n)  svr4_dbx_register_map[n]


/* Output assembler code to FILE to call the profiler.  */

#undef NO_PROFILE_COUNTERS
#define NO_PROFILE_COUNTERS

#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO)				\
{									\
  if (flag_pic)								\
    fprintf (FILE, "\tcall __mcount@PLT\n");				\
  else									\
    fprintf (FILE, "\tcall __mcount\n");				\
}


#undef HAS_INIT_SECTION

/* This is how we tell the assembler that two symbols have the same value.  */

#define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
  do { assemble_name(FILE, NAME1); 	 \
       fputs(" = ", FILE);		 \
       assemble_name(FILE, NAME2);	 \
       fputc('\n', FILE); } while (0)

/* A C statement to output to the stdio stream FILE an assembler
   command to advance the location counter to a multiple of 1<<LOG
   bytes if it is within MAX_SKIP bytes.

   This is used to align code labels according to Intel recommendations.  */

#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)			\
  if ((LOG) != 0) {							\
    if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
    else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
  }
#endif

/* We always use gas here, so we don't worry about ECOFF assembler
   problems.  */
#undef TARGET_GAS
#define TARGET_GAS	1

/* Default to pcc-struct-return, because this is the ELF abi and
   we don't care about compatibility with older gcc versions.  */
#define DEFAULT_PCC_STRUCT_RETURN 1

#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (NetBSD/i386 ELF)");